Universidade do Estado do Rio de Janeiro, Departamento de Biofísica e Biometria, LARAMG - Laboratório de Radioecologia e Mudanças Climáticas, Rua São Francisco Xavier, 524, 20550-013 Rio de Janeiro, RJ, Brazil.
Protistology and Aquatic Ecology, Ghent University, Krijgslaan 281, 9000, Gent, Belgium.
An Acad Bras Cienc. 2022 Apr 8;94(suppl 1):e20210810. doi: 10.1590/0001-3765202220210810. eCollection 2022.
It is estimated that the explosive Hudson volcano eruption in Southern Chile injected approximately 2.7 km3 of basalt and trachyandesite tephra into the troposphere between August 8-15, 1991. The Hudson signal has been detected in Antarctica at the eastern sector and in South Pole snow. In this work, we track the Hudson volcanic plume using a dispersion model, remote sensing, and a re-analysis of a high-resolution ice core analysis from the Detroit Plateau in the Antarctic Peninsula and sedimentary records from shallow lakes from King George Island (KGI). The Hudson eruption imprint in these records is confirmed by using a weekly resolved aerosol concentration database from KGI demonstrating that the regional impact of Hudson eruption predominates over the Mount Pinatubo/Phillippines volcanic signal, dated from June 1991, in terms of particulate matter depositions. The aerosol elemental composition of Ca, Fe, Ti, Si, Al, Zn, and Pb increases from 2 to 3 orders of magnitude in background level during the days following the eruption of the Hudson volcano.
据估计，1991 年 8 月 8 日至 15 日，智利南部的 Hudson 火山爆发向平流层中喷射了约 2.7 立方公里的玄武岩和粗安岩火山灰。Hudson 火山喷发信号已在南极洲东部和南极点的雪地上被检测到。在这项工作中，我们使用扩散模型、遥感和南极半岛 Detroit 高原的高分辨率冰芯分析以及来自 King George 岛（KGI）的浅湖沉积物记录来追踪 Hudson 火山羽流。这些记录中 Hudson 火山喷发的印记通过使用 KGI 的每周分辨率气溶胶浓度数据库得到了确认，该数据库表明，在颗粒物沉积方面，Hudson 火山喷发的区域性影响超过了 1991 年 6 月菲律宾 Mount Pinatubo 火山喷发的信号。在 Hudson 火山喷发后的几天内，Ca、Fe、Ti、Si、Al、Zn 和 Pb 等元素的气溶胶浓度从背景水平增加了 2 到 3 个数量级。
